[Code of Federal Regulations]
[Title 47, Volume 5]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR90.214]

[Page 355-356]
 
                       TITLE 47--TELECOMMUNICATION
 
                         COMMISSION (CONTINUED)
 
PART 90--PRIVATE LAND MOBILE RADIO SERVICES--Table of Contents
 
                 Subpart I--General Technical Standards
 
Sec. 90.214  Transient frequency behavior.

    Transmitters designed to operate in the 150-174 MHz and 421-512 MHz 
frequency bands must maintain transient frequencies within the maximum 
frequency difference limits during the time intervals indicated:

----------------------------------------------------------------------------------------------------------------
                                                                                  All equipment
        Time intervals 1, 2              Maximum frequency     -------------------------------------------------
                                          difference \3\              150 to 174 MHz           421 to 512 MHz
----------------------------------------------------------------------------------------------------------------
                Transient Frequency Behavior for Equipment Designed to Operate on 25 kHz Channels
----------------------------------------------------------------------------------------------------------------
t1 4..............................  25.0 kHz        5.0 ms                      10.0 ms
t2................................  12.5 kHz        20.0 ms                     25.0 ms
t3 4..............................  25.0 kHz        5.0 ms                      10.0 ms
----------------------------------------------------------------------------------------------------------------
               Transient Frequency Behavior for Equipment Designed to Operate on 12.5 kHz Channels
----------------------------------------------------------------------------------------------------------------
t1 4..............................  12.5 kHz        5.0 ms                      10.0 ms
t2................................  6.25 kHz        20.0 ms                     25.0 ms
t3 4..............................  12.5 kHz        5.0 ms                      10.0 ms
----------------------------------------------------------------------------------------------------------------
               Transient Frequency Behavior for Equipment Designed to Operate on 6.25 kHz Channels
----------------------------------------------------------------------------------------------------------------
t1 4..............................  6.25 kHz        5.0 ms                      10.0 ms
t2................................  3.125 kHz       20.0 ms                     25.0 ms
t3 4..............................  6.25 kHz        5.0 ms                      10.0 ms
----------------------------------------------------------------------------------------------------------------
\1\on is the instant when a 1 kHz test signal is completely suppressed, including any capture time due to
  phasing.
t1 is the time period immediately following ton.

[[Page 356]]


t2 is the time period immediately following t1.
t3 is the time period from the instant when the transmitter is turned off until toff.
toff is the instant when the 1 kHz test signal starts to rise.
2 During the time from the end of t2 to the beginning of t3, the frequency difference must not exceed the limits
  specified in Sec.  90.213.
3 Difference between the actual transmitter frequency and the assigned transmitter frequency.
4 If the transmitter carrier output power rating is 6 watts or less, the frequency difference during this time
  period may exceed the maximum frequency difference for this time period.

[62 FR 2040, Jan. 15, 1997]